服务器的种类有哪些？43.227.205.x

        一、按外形分类

       1，直立式服务器(塔式服务器)：

为可独立放置于桌面或地面的服务器，大都具有较多的扩充槽及硬盘空间。无需额外设备，插上电即可使用，因此使用最为广泛。

        2，刀片式服务器：

        是指在标准高度的机架式机箱内可插装多个卡式的服务器单元，实现高可用和高密度。每一块“刀片”实际上就是一台服务器。可以通过自身的硬盘启动自己的操作系统，类似于一个个独立的服务器。

        3，机架式服务器：

        为可装上机柜之服务器，主要作用为节省空间，机台高度以1U为单位，1U约44mm，因空间较局限，扩充性较受限制，例如1U的服务器大都只有1到2个PCI扩充槽。此外，散热性能成为十分重要的因素，此时，各家厂商的功力就在此展现了。缺点是需要有机柜等设备，多为服务器用量较大的企业使用。

        二、按应用层次分类

        1，入门式服务器：

        这类服务器是最基础的一类服务器，也是最低档的服务器。入门级服务器主要采用Windows或者NetWare网络操作系统，可以充分满足办公室型的中小型网络用户的文件共享、数据处理、Internet接入及简单数据库应用的需求。

        2，工作组服务器：

        是一个比入门级高一个层次的服务器，但仍属于低档服务器之类。从这个名字也可以看出，它只能连接一个工作组(50台左右)那么多用户，网络规模较小，服务器的稳定性也不像企业级服务器那样高的应用环境，当然在其它性能方面的要求也相应要低一些。

        3，部门级服务器：
        这类服务器是属于中档服务器之列，一般都是支持双CPU以上的对称处理器结构，具备比较完全的硬件配置，如磁盘列、存储托架等。部门级服务器的最大特点就是，除了具有工作组服务器全部服务器特点外，还集成了大量的监测及管理:路，具有全面的服务器管理能力，可监测如温度、电压、风扇、机箱等状态参数，结合标准服务器管理软件，使管理人员了解服务器的工作状况。

        4，企业级服务器：
        企业级服务器是属于高档服务器行列，正因如此，能生产这种服务器的企业也不是很多。企业级服务器最起码是采用4个以上CPU的对称处理器结构，有的高达几十个。另外一般还具有独立的双PCI通道和内存扩展板设计，具有高内存带宽、大容量热插拔硬盘和热插拔电源、超强的数据处理能力和群集性能等。企业级服务器适合运行在需要处理大量数据、高处理速度和对可靠性要求极高的金融、证券、交通、邮电、通信或大型企业。

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